U.S. Department of Health & Human Services
A syllabus of the lectures on hygiene, vital statistics, etc. by Prof. Jno. S. Billings and Dr. A.C. Abbott at the University of Pennsylvania, 1891-92
Billings, John S. (John Shaw), 1838-1913, author
Abbott, A. C. (Alexander Crever), 1860-1935, author
Egbert, Seneca, 1863-1939, editor University of Pennsylvania.
Philadelphia : Collins Printing House, 1892
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